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Finding the Fourth Proportional to 1,621.82, 2,430.66 and 696.27

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Solution

The fourth proportional to 1,621.82, 2,430.66 and 696.27 is: 1,043.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.82 : 2,430.66 = 696.27 : x
  2. Step 2: Convert to fraction form
    1,621.82/2,430.66 = 696.27/x
  3. Step 3: Cross multiply
    1,621.82x = 2,430.66 × 696.27
  4. Step 4: Simplify right side
    1,621.82x = 1,692,395.64
  5. Step 5: Solve for x
    x = 1,692,395.64/1,621.82
  6. Step 6: Final answer
    x = 1,043.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.